Alfbed don



` (No Model.)

A. DON. SMOKE GONSUMING APPARATUS FOR STEAM BOILBRS. No. 376.948.

Patented Jan. 24.,A 1888.

- INVBNTOR:

ATTORNEYS.

. WITNESSES:

N. PETERS. Pnumumugmpmr, wmingmn. u. u.

UNITED STATES PATENT OFFICE, 1

ALFRED DON, OE 2i COOPER STREET, REDEERN, SYDNEY, NEW SOUTH WALES, AUSTRALIA.

sMoKE-ooNsuMiNG APPARATUS yFOR s/Tl-:Alvl-BOflLERs.

SPECIFICATION forming paru of Letters Patent No.3;76f94, dared January'2418aa.' Y Applioationliled May Q4, 1887'. Serial No. 239,202. (No model.) l y Y To all whom it may concern:

Be it known that IALFRED DON, engineer, a subject of. the Queen of Great Britain, and residing at Redfern, Sydney, in the Colony of New South Wales, Australia, have invented a new and useful YImprovement in Smoke-Consuming Apparatus for Steam Boilers and Method of Applying the Same, of which the following is a full, clear, and exact description.y

My invention relates to steam-boiler and other furnaces; and its objects are to vprovide the same with a simple, efficient, andinexpensive apparatus, whereby a jetof combinedair l out in the claims. o

Numerous devices have heretofore been resorted to having for their Object the'consump- Y tion and dispersion of smoke in the furnaces specified land the increase of combustion of fuel therein; but they have either been for the most ypart costly and complicated in them- Vincreasing combustion; but the apparatusr heretofore employed for that purpose and the methods of applying the same have either not insured complete success, or, if successfully used, such methods-and apparatus have not possessed the simplicity, efficiency, and cheap-v p ness, nor the facility of application and operation in connection with any of the furnaces specified, which inhere to my method and apparats. j L j My invention is illustrated in the accompanying drawings,gforming a part of thisspecifif. i

` cation, in which similar rletters of referencev55 indicate` corresponding partsin theseveral f views. Y Y Figure l is a vertical sectional side eleva- K tion of part of aboiler-furnace,showing'inyinvention applied, taken on the line xfa; of Fig'. 6o f -2. Fig.'2 is an end elevationofthe same;` 3

Fig." 3 isa side elevation of myixnproved apparatus,"a part being broken away'and indicatedin dotted lines. Fig. 4 Vis avertical ysecf tional view of the same, takenronlthe line y .-g/ V in Fig. l3; and Fig. ,5 is a plan view ofthe air-v pipe of the apparatus.

In said drawings, A'is the fire-box; A', the

vsteam-space; B, the-furnace-door; C,-an air-VV pipe secured tothefurnace and entering the 7o i 'fire-box; D, 'a steam-pipe extending from the steam-chestto and Within the air-pipe, and E a cock or valve Jwhich controls the .supply o f Y steam.

-In carrying out my invention I construct the air-pipe C either of cast or wrought iron and of an oval shape in'cross-section. Said pipe` may have any othersuitable contour,the form specified, however, being in my view the prefl erable one. For application to the furnace of 8c l an ordinaryk locomotive-boiler of the dimensions 'of four feet five inches by three ,feet

eight inches, I constructsaid piper'of alength Y i. of eighteen inches (althoughV that precise v y ylength is not very material) and ofadiameter L of four inches byrtwo and one-halfinches.V Although Said diameter may be' slightly einV ceeded or diminished with approximately' the same'result in operation,I have found'in prac:

tice that a-larger or smaller pipe is-not as 9o effective as one of,y the diameter speciiied. .if

It Will bennderstoo'd that when my im-vr i' proved apparatus isl to `be employed upon larger furnaces-such, for instance, asthose of v marine boilers-said pipe will be constructed of a lengthand diameter proportioned to the size and fuel capacity kof the furnace. The pipe C 'isformed'with a bell-shaped y mouth, a, at its top or upper end, and its lower part is-nbent or curved at or nearlya right IOOv angle with its stem,as atb, to adapt it toenter the re-boX,as hereinafter explained,said pipe being substantially L-shaped. Its lower extremity is formed with a bell-shaped exit, c, having a slight downward defiection, and at suitable distances along its stem said pipe is provided with lugs or eyes d, to receive bolts or screws for securing it to the furnace. The bent or curved portion of said pipe is given such an angle that aline drawn from the upper inner side of the stem of the pipe will meet the outer end ofthe fire-box just above the fuel therein. The faces of tbe bell-shaped exit c are formed at such an angle that lines produced therefrom will reach all the sides or angles of the lire-box opposite thereto just above the level of the fuel thereiu,so that jets of'steam and induced currents of air passing through the pipe (l will, by means of the deilection of said bell-shaped c xit c, be projected equally all over the surface of the fuel, and will consume and disperse all the smoke aris` ing therefrom. To secure this result in a furnace of the size above mentioned, I form the bellshaped exit c with an angle of delec# tion of about threefourths of an inch and of the dimensions of about six inches by three inches, the curve or bend of the pipe allowing said exit to extend about one and three-quarter inch within the lire-box. These dimensions and the deflection of said exit, as well as the bend of said pipe, may be varied to accommodate the apparatus to larger furnaces, as will readily be understood.

A steam-pipe, D, preferably of copper and about one-half an inch in diameter, is bent at its lower end correspondingly with the curved portion of the pipe C, is passed into said pipe so that its exit is just beyond the commencement of the bend of the latter pipe, and is fixed within the center of the said pipe by suitable stays or brackets, e. Said pipe D is extended upward along and over the end of the furnace as far as possible, in order to insure dryness of the steam it is to convey to a connection with the steam-chest, and is controlled at or near such connection by a suitable steam cock or valve, E. A steamtrap of any approved form may be placed at any desired point in the pipe D between the steam-cock and the mouth of the pipe C, to aid in securing dry steam, if preferred.

A valve or lid, f, as shown in Fig. 5, or of any other suitable and preferred.construction, is provided the mouth of the air-pipe C, so that air may be admitted or excluded from the pipe, as required.

When my improved apparatus is to be applied to the furnace of a locomotive-boiler, I cut or form centrally of the upper edge of the door B an opening suited to admit the passage of the lower curved portion of the pipe C, so that when the door is closed an approximately tight joint is formed between it and said pipe.

Whenthe apparatus is to be applied to the furnace of a marine boiler, I provide the opening for the pipe O at the end of the furnace in the dead-plate immediately above the center of the upper edge of the door.

The pipe C is placed with its stem against the end of the furnace, so that its curved portion b projects within the fire-box, as shownin Fig. l, and is secured in place by bolts or screws passed through the lugs d into suitable apertures in the shell of the furnace; or the lugs may be dispensedY with and any other proper means be adopted to hold the pipe in place. The pipe D is inserted in the pipe C, so that its lower end enters the curved portion b of said pipe, and is held to place centrally of said pipe by the stays e, or other suitable means, as preferred, and is connected to the steamchest and supplied with a valve iu the usual manner. When fuel has been introduced into the fire-box and the door has been closed, by opening the lid of the air-pipe and opening the valve of the steam-pipe a jet of steam ,in the pipe D and a current of air induced thereby in the pipe C combine in the part b of said air-pipe and pass together out of the exit c into the fire-box, and will have the effect, by careful stoking on the part of the attendant, of almost immediately dispersing the smoke generated by the fuel, and, forcing it into the mass of saidfuel, cause it to be consumed and at the same time render the fuel incandescent. Combustion having been thus aided, the steam may be shut ofi', the lid lof the air-pipe being left open for about a half minute or so, to allow the air to escape.

I have found in practice that the use of the steam-jet for but a few seeconds of time will ICO in ordinary cases suffice; but iu cases where the fuel added is bulky of itself, or is introduced in great quantity, a longer time may be required. i

When it is desired to consume or disperse smoke in the fire-box before the tire is started fairly enough to make steam, or it is desired to hasten the making of steam, my apparatus may be supplied with steam from another source by connecting the steam-pipe or airpipe in any suitable manner with the same, and the operation may be conducted as effectively as when the steam is derived from the furnace to which the apparatus is applied.

My invention is readily applied to 1ocomotiveboilers at a nominal cost and Without requiring alteration in their construction, and when applied renders the use of baffle-plates unnecessary and produces a much better result.

By the construction and arrangement of the air-pipe and steam-pipe, as herein shown and described, I am enabled to secure a direct and instantaneous effect of the steam and air upon the fuel, as bot-h quickly combine, and the combined jet is evenly projectedall around the fire-box and upon every part of the surface of the fuel.

The air whichy is induced to the pipe C by the vacuum created by the jet of steam is also of the temperature best suited for the desired object, being not too hot to diminish the supaventi;4` ,i r e. l'

ply ofoxygen and yet sufficiently warm to obviate the disadvantages incident to the introduction of Vcold air into the furnace. The bell-shaped mouth of the air-pipe also aids in the induction of air' by the action of the steam, and so expedites the action of the jet in the iire-oox, while the bell-shaped exit insures complete action of the jet upon the fuel.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-'- y l. As a new article of manufacture, an vattachment'for'stearn-boiler and other furnaces,

consisting of an I 'shaped air-induction pipe secured to the end ofthe furnace, and its curved portion projecting Within the rejbox throughy kan opening in the furnace, having a bell-shaped mouth fitted with a lid or Valve, and a bellshaped exit deiiected downwardly above the fuel in the fire-box, said pipe being adapted Vforth.

to receive a steam-supply.pipe, substantia11y Y l as described and shown, for the purposes'setl D; LIPER, l Solicitor, Sydney.

v .JOSEPH TRACEY,

' Sydney. 

